Electric light bulb



FIG. 1 is a perspective view of a electric light bulb showing our new design, with the broken lines showing for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a opposite side elevational view thereof. 

The ornamental design for a electric light bulb, as shown and described. 